Duplex filter for preparation preparation extraction tank

Abstract

The utility model discloses a duplex filter for a preparation preparing and extracting tank. The duplex filter comprises two filtering tank bodies, a liquid inlet pipeline and a liquid outlet pipeline, wherein the liquid inlet pipeline and the liquid outlet pipeline are connected between the two filtering tank bodies; a hollow pressing piece is arranged in the liquid inlet space, and the sealing cover rotates on the filtering tank body in a threaded mode and abuts against the pressing piece to press the sealing washer when the sealing cover rotates to move downwards. The utility model relates to the technical field of pharmaceutical filtering equipment, in the thread screwing process of a sealing cover, thread screwing force is directly and stably transmitted to a pressing piece, and then a sealing gasket is pressed, so that the uniformity of pressing force and position every time is ensured, the reliability and consistency of sealing are remarkably improved, and the sealing effect is improved. And the leakage risk caused by non-uniform manual pressing is effectively avoided. Therefore, the operations of replacing the filter cartridge and pressing the sealing gasket can be continuously completed at one time, the operation process is simplified, and the operation steps and the time cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical filtration equipment technology, specifically a dual filter for a formulation preparation extraction tank. Background Technology

[0002] In pharmaceutical preparation, the extraction tank is a key piece of equipment used to extract active ingredients from plant, animal, and other raw materials. A filter is typically installed at the extraction tank outlet to remove solid impurities from the extract. In existing technologies, dual filters usually consist of two filter tanks, each containing a filter cartridge. When replacing a filter cartridge, workers must manually press a new sealing gasket into the gap between the top of the cartridge and the inner wall of the filter. This process is difficult to guarantee precise and even sealing, leading to inconsistent sealing. A pressure cap also needs to be placed on top of the cartridge and rotated to engage with a groove on the filter's inner wall. The entire cartridge replacement process is cumbersome and time-consuming. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a dual-stage filter for pharmaceutical preparation extraction tanks, which solves the problem that when replacing the filter cartridge in existing dual-stage filters, manual pressing of the sealing gasket makes it difficult to press it into place accurately and evenly, resulting in unstable filter sealing performance.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dual filter for a pharmaceutical preparation extraction tank, comprising two filter tanks and an inlet pipe and an outlet pipe connecting the two filter tanks; each filter tank is topped with a cap and has a filter cartridge seated inside, the top of the filter cartridge and the cap forming an inlet space communicating with the inlet pipe, and a sealing gasket is provided between the circumferential surface of the top of the filter cartridge and the inner wall of the filter tank; a hollow pressure member is provided in the inlet space, and holes are provided on the side wall and bottom of the pressure member to allow liquid flowing in from the inlet pipe to enter the filter cartridge; the cap is threaded and rotates on the filter tank, and when rotating downwards, it abuts against the pressure member to press the sealing gasket.

[0005] Preferably, the pressure member is a hollow cylindrical structure; the hole includes a side opening on the side wall of the cylindrical structure and a liquid outlet opening at the bottom.

[0006] Preferably, the cylindrical structure includes a first part at the top, a second part at the bottom, and a plurality of support parts connecting the first part and the second part, with a side opening formed between two adjacent support parts.

[0007] Preferably, there are multiple side openings, and the largest inscribed circle diameter of any one of the side openings is greater than the diameter of the inlet pipe.

[0008] Preferably, a cover plate is fixed to the top of the first part to make the first part closed.

[0009] Preferably, the second part is provided with an O-ring in the circumferential direction, and the O-ring abuts against the inner wall surface of the filter tank.

[0010] Preferably, the bottom of the cap is provided with an annular extension, and the side wall of the annular extension is threadedly connected to the inner wall of the filter tank opening.

[0011] Preferably, a wear-resistant washer is provided between the annular extension and the pressing member.

[0012] Preferably, the sealing gasket includes a first sealing gasket and a second sealing gasket that overlap each other; the first sealing gasket is disposed in the gap between the filter cartridge and the filter tank, the second sealing gasket is disposed on top of the first sealing gasket, and a portion of the second sealing gasket is pressed against the filter cartridge.

[0013] Preferably, the cover is provided with a handle.

[0014] The beneficial effects of this utility model are as follows: By using the dual filter for formulation preparation extraction tanks provided by this utility model, compared with the prior art, after replacing the filter cartridge, the operator no longer needs to manually squeeze the sealing gasket into the gap between the filter cartridge and the inner wall of the filter, nor does it require separate placement and insertion of the cap. During the tightening of the cap threads after filter cartridge replacement, the tightening force is directly and stably transmitted to the pressing component to press the sealing gasket, ensuring the uniformity of pressing force and position each time, significantly improving the reliability and consistency of the seal, and effectively avoiding the risk of leakage caused by uneven manual pressing. This allows the filter cartridge replacement and sealing gasket pressing operations to be completed in one continuous operation, simplifying the process and reducing operational steps and time costs. Attached Figure Description

[0015] Figure 1 This is an isometric drawing of the present invention;

[0016] Figure 2 This is the front view of the present utility model;

[0017] Figure 3 This is a top view of the present invention;

[0018] Figure 4 This is a diagram showing the positional relationship between the pressing component, the cap, and the sealing ring of this utility model;

[0019] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 6 This is a schematic diagram of the pressing structure of this utility model.

[0021] Explanation of the reference numerals in the figure:

[0022] 1. Filter tank body, 2. Cover, 3. Liquid inlet space, 4. Filter cartridge, 5. Annular extension, 6. Pressing element, 61. First part, 62. Second part, 63. Support part, 7. Liquid inlet pipe, 8. Liquid outlet pipe, 9. Wear-resistant gasket, 10. Side opening, 11. Cover plate, 12. Liquid outlet opening, 13. O-ring, 14. First sealing gasket, 15. Second sealing gasket. Detailed Implementation

[0023] To better explain and facilitate understanding of this invention, the following description is provided in conjunction with the accompanying drawings. Figures 1 to 6 The present invention will be described in detail below through specific embodiments. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation schemes as long as the effects of the present invention can be achieved.

[0024] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process.

[0025] This application provides an embodiment of a dual filter for a formulation preparation extraction tank, such as... Figure 1-3 As shown, the system includes two filter tanks 1, an inlet pipe 7, and an outlet pipe 8 connecting the two filter tanks 1. Each filter tank 1 has a cap 2 on its top, with a handle for picking up and rotating the cap. Each filter tank 1 contains a filter cartridge 4, which includes a stainless steel filter cartridge and a filter screen inside the stainless steel filter cartridge. It should be noted that an annular retaining plate is provided on the inner wall of the filter tank 1, and the filter cartridge 4 is hung on the retaining plate. A sealing gasket is provided between the top circumference of the filter cartridge 4 and the inner wall of the filter tank 1 to secure the filter cartridge 4 and ensure that liquid can enter the filter cartridge 4.

[0026] like Figure 2 As shown, a liquid inlet space 3, communicating with the liquid inlet pipe 7, is formed between the top of the filter cartridge 4 and the cap 2. A hollow pressure member 6 is provided in the liquid inlet space 3 for pressing the sealing gasket. In addition, holes are opened on the side wall and bottom of the pressure member 6 so that the liquid flowing in from the liquid inlet pipe 7 can enter the filter cartridge 4. In this embodiment, the cap 2 is screwed onto the filter tank 1 and abuts against the pressure member 6 when it rotates downward, so that the pressure member 6 presses down to press the sealing gasket.

[0027] like Figure 5 As shown, the sealing gaskets in this embodiment include a first sealing gasket 14 and a second sealing gasket 15 that overlap each other, both of which are rubber gaskets. The first sealing gasket 14 is disposed in the gap between the filter cartridge 4 and the filter tank 1, forming an inner seal between the top circumference of the filter cartridge 4 and the mounting plate. The second sealing gasket 15 is disposed on top of the first sealing gasket 14, and a portion of the second sealing gasket 15 is pressed against the filter cartridge 4. The second sealing gasket 15 contacts the pressing member 6 and is pressed by the pressing member 6, forming a double seal with the first sealing gasket 14. This simultaneously seals the gap between the filter cartridge 4 and the first sealing gasket 14, and also compresses the filter cartridge 4, enhancing the sealing performance of the filtration process, preventing leakage, and improving the filtration effect.

[0028] like Figure 2 and Figure 4 As shown, in this embodiment, the bottom of the cover 2 is provided with an annular extension 5. The side wall of the annular extension 5 is threadedly connected to the inner wall of the filter tank 1, so as to realize the connection between the cover 2 and the filter tank 1 and move downward when the threaded rotation connection is made, so that the annular extension 5 can press the pressure piece 6.

[0029] Furthermore, a wear-resistant washer 9 is provided between the annular extension 5 and the pressure member 6. The wear-resistant washer 9 is a rubber washer to prevent the annular extension 5 from directly contacting the pressure member 6 and causing hard friction during rotation.

[0030] It needs to be explained in detail, such as Figure 2 As shown, the pressure member 6 in this embodiment is a hollow cylindrical structure; the hole includes a side opening 10 opened on the side wall of the cylindrical structure and a liquid outlet opening 12 at the bottom, so that the liquid flowing in from the liquid inlet pipe 7 can flow into the filter cartridge 4 through the side opening 10 and the liquid outlet opening 12.

[0031] For example, such as Figure 6 As shown, the cylindrical structure in this embodiment includes a first part 61 at the top, a second part 62 at the bottom, and a plurality of support parts 63 connecting the first part 61 and the second part 62. A side opening 10 is formed between two adjacent support parts 63. The presence of multiple support parts 63 results in multiple side openings 10, and the largest inscribed circle diameter of any side opening 10 is larger than the diameter of the inlet pipe 7, facilitating the insertion of the pressure member 6 and ensuring that the liquid flowing into the inlet pipe 7 flows smoothly into the inlet space 3.

[0032] Furthermore, in this embodiment, a cover plate 11 is fixed to the top of the first part 61, making the first part 61 closed and isolating the cover 2 from the liquid inlet pipe 7, effectively preventing liquid from contacting the cover 2. An O-ring 13 is provided circumferentially for the second part 62, and the O-ring 13 abuts against the inner wall surface of the filter tank 1, and the O-ring 13 is positioned above the sealing gasket, forming the first layer of sealing on the outside; at the same time, it can also prevent the pressure member 6 from impacting the inner wall of the filter tank 1 when it moves up and down.

[0033] In addition, this embodiment also discloses a method for replacing the filter cartridge 4 in any filter tank 1, specifically: rotate the cover 2 in the reverse direction and remove the annular extension 5 from the filter tank 1, use a hex wrench or the operator's hand to reach into the side opening 10 along the gap between the pressure member 6 and the filter tank 1, hook the opening position of the side opening 10 and pull it upward to remove the pressure member 6, then remove the sealing gasket and the filter cartridge 4 in sequence, replace the new filter cartridge 4 and reposition the sealing gasket and the pressure member 6, then rotate the cover 2 to connect it to the filter tank 1, and move the pressure member 6 downward to press it in place, so that the pressure member 6 presses down to press the sealing gasket.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual filter for a pharmaceutical preparation extraction tank, comprising two filter tanks and an inlet pipe and an outlet pipe connected between the two filter tanks; each filter tank is provided with a cap on top and a filter cartridge is mounted inside, wherein the top of the filter cartridge and the cap form an inlet space communicating with the inlet pipe, characterized in that: A sealing gasket is provided between the top circumference of the filter cartridge and the inner wall of the filter tank; a hollow pressure member is provided in the liquid inlet space, and holes are opened on the side wall and bottom of the pressure member so that the liquid flowing in the liquid inlet pipe can enter the filter cartridge; the sealing cap is screwed on the filter tank body and abuts against the pressure member to press the sealing gasket together when it rotates downward.

2. The double filter for the extraction tank according to claim 1, characterized in that: The pressure member is a hollow cylindrical structure; the hole includes a side opening on the side wall of the cylindrical structure and a liquid outlet opening at the bottom.

3. The double filter for the extraction tank according to claim 2, characterized in that: The cylindrical structure includes a first part at the top, a second part at the bottom, and several support parts connecting the first part and the second part, with a side opening formed between two adjacent support parts.

4. The double filter for the extraction tank according to claim 3, characterized in that: There are multiple side openings, and the largest inscribed circle diameter of any one of the side openings is greater than the diameter of the inlet pipe.

5. The double filter for the extraction tank according to claim 3, characterized in that: The top of the first part is fixed with a cover plate to make the first part closed.

6. The double filter for the extraction tank according to claim 3, characterized in that: The second part is provided with an O-ring in the circumferential direction, and the O-ring abuts against the inner wall surface of the filter tank.

7. The double filter for the extraction tank according to claim 1, characterized in that: The bottom of the cap is provided with an annular extension, and the side wall of the annular extension is threadedly connected to the inner wall of the filter tank opening.

8. The double filter for the extraction tank according to claim 7, characterized in that: A wear-resistant gasket is provided between the annular extension and the pressing component.

9. The double filter for the extraction tank according to claim 1, characterized in that: The sealing gasket includes a first sealing gasket and a second sealing gasket that overlap each other; the first sealing gasket is disposed in the gap between the filter cartridge and the filter tank, and the second sealing gasket is disposed on top of the first sealing gasket, with a portion of the second sealing gasket pressed against the filter cartridge.

10. The double filter for the extraction tank according to claim 1, characterized in that: The cover is equipped with a handle.

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